Alfred foucaut



A. FAUGAUT.

SUBMARINE TELEGRAPH GABLE.

Patented May 18,1869

dttittd giant stint (lii'ilirr.

Letters Patent No. 90,089, dated May 18. 1869.

HJPROVENI'ENT IN SWINE-TELEGRAPH GABLES.

The Schedule referred .to in these Letters Patent and makin part of the same.

T a all whom it my concern:

Be it known that i, ALFRED FOUCAUT, oi the city o Orleans, in the Empire of France, have invented a new and useful Improvement; in Telegraphic Cables; and I d" 'iereby declare the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, andto the figures ofreference marked thereon To enable others skilled in the art to make and use my said invention, I will proceed to describe the same.

in making a cable oi one or more conductors, Iuse, as conductors, single copper or other metallic wires, or i twist several smaller wires together, formingone conductor of the proper size.

i cover each conductor with a coating of guttaercha, or, instead of the gntta-pcrcha, I ibrrnacornposition of ceruse, or carbonate of lead, finely powdered, and mined with litharged oil and sawdust to the proper consistency. I then cover the gutta-percha, or composition already described, with a metallic conductingcoating.

I use preferably a coating ofpiumbago, applied by diction, or a coating of tin-foil, or I wrap a small copper wire, or other metallic wire, in a long spiral around the gntta-percha or composition.

Any conductor, properly applied, will answer the same purpose.

This metallic surface or wire is connect-3d with the ground at cach end of the cable, or at any other point or points that may be required to carry ofl, or properly employ and control all induced currents of electricity.

Over this I wrap a cotton thread, completely covering the gutta-percha, or composition, and the outside conducting-surface, formedas above described.

I then saturate a linen band with a mastic, composed of ceruse, or carbonate of lead, finely powdered, and mixed with litharged oil to a proper consistency, and I wrap the linen band so prepared around each conductor already covered, as above described, each turn of the band lapping over the previous turn.

The ditferent conductors are then brought together and wrapped with the same band, and over all is wrapped a tarred rope, of the thickness desired, which is covered with a coating of coal-tar.

Cables for sub marine use may be afierward armored, as usual, with iron wires, of a size suitable to the localityand the woil which they have to perform.

Figure 1 is a longitudinal section of my invention.

Figure 2 is a vertical section of the same, showing a group of wires contained within the cable, each one of which may be constructed separately and used for telegraphic purposes.

The small figures in said drawing denote the various portions and materials used in the construction of the cable, to wit:

Figure 1 is the wire conductor.

Figure 2 represents gutta-percha, or a composition of ceruse, or carbonate 0f-lead.

Figure {5, a metallic conducting enrfaoe on he 0 side of the guttaipercha, or composition, or tin-foil,or copper wire.

Figure 4, cottot thread.

Figure 5, linen band, saturated with carbonate of lead, or ceruse.

' Figure 6, tarred rope.

Figure 7, coating of coal-tar.

The different colors are intended to represent the different materials used, as above.

I am aware that a metallic coating, consistin'g of a metallic strip, wound around the insulating-material, is not new, but said metallic strip has been used as a conductor of the main current.

This difiers from my invention in that my metallic coating acts as a conductor for the induced current alone, and is intended to be used when several conductors are grouped together, as shown in the drawings, which is not the case in the invention above rci'erred to.

It is also an important feature of my invention that the conductors should be placed in connection with the earth.

My method or applying the metallic coating is believed to totally destroy the effects of induction, and is of great eiiiciency in increasing the transmittingpower of submarine cables.

I am also aware of the patent granted to A. I. B. De Morat, January 20, 1867, and disclaim the mode of construction of cables as by him described in said patent.

What I claim as new, and desire to secure by Lettors Patent, is-

1. Tire construction of a telegraphic cable, in the manner and for the purpose lrcreinllescribed.

2. A conducting-snriitce for induction-currents, when applied to the outside of the insulating-coating of each group of conductors, in the manner and for the pur pose herein described.

3. A band, composed of linen, or analogous material, saturated with a. compound of carbonate of lead,

and litharged, or other oil, when arranged in a telegraphic cable, in the manner and for the purpose herein described.

4. In a telegraphic cable, the construction of the coatings, formed of gutta-percha, or composition, the metallic conducting-surface, the cotton thread, the band saturated with mastic, and the tarred rope, arranged in the manner and for the purpose described.

5. As an insulating-material, used in th'e'construction of telegraphic cables, the composition, composed of carbonate of lead, or other similar substance, litharged, or other oil, sawdust, or other analogous fibrous substance, in the manner and for the purpose herein described.

In witness whereof, I have hereunto set my hand, this 26th day of December, 1868. i

Witnesses: DB. FOUOAUT W. HAUFF, S L. Masons. 

